body,*{margin: 0 auto;}
a{text-decoration-line: none;}
.header{width: 100%;height: 80px;background-color: black;margin: 0 auto}
.concent{width:90%;margin: 0 auto;overflow: hidden;}
.header_left,.header_mid,.header_right{width: 30%;float: left;overflow: hidden;}
.header_left img{height:60px;float: left; padding:10px}
.header_left span{height: 80px;float: left;line-height: 80px;
    font-family: Arial, Helvetica, sans-serif;color: #bcbcca;font-size: 23px;}
.header_mid ul{list-style: none;}
.header_mid ul li{float: left;width: 25%;height: 80px;
    line-height: 80px;text-align: center;} 
.header_mid ul li.active a{color: red;}
.header_mid a{font-size: 16px; color: white;}
.header_mid a:hover{color: red;}
.header_right{color:white;float: right;}
.header_right img{height: 40px;padding-top: 20px;float: left;}
.header_right span{height: 80px;float: left;line-height: 80px;margin-left: 20px;}
.header_right button{width: 100px;height: 40px;color: white;border-radius: 10px;cursor: pointer;
    margin:20px 0px 0px 20px;background-color: black;border: 1px solid white;}
.header_right button:hover{background-color: #f74906;border-color: #f74906;}
